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Western Australian Government Railways classes P and Pr “River”
In the 1920s, WAGR found that it did not have a sufficient number of suitable locomotives for long-distance express trains and that the 1902 E-class Pacifics were no longer up to date. The main aim was to eliminate th...
| Western Australian Government Railways classes P and Pr “River”Remove | |
|---|---|
| Variant | |
| Built | 1924-1929 |
| Manufacturers | North British;Midland Railway Workshops |
| Wheel arrangement | 2C1 |
| Gauge | 1067 mm |
| Length | 18948 mm |
| Service mass | 103891 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | Western Australian Government Railways classes P and Pr “River”Remove |
|---|---|
| Built | 1924-1929 |
| Manufacturers | North British, Midland Railway Workshops |
| Wheel arrangement | 4-6-2 (Pacific) |
| Gauge | 1,067 mm |
Dimensions and weights
| Property | Western Australian Government Railways classes P and Pr “River”Remove |
|---|---|
| Length | 18.95 m |
| Service mass | 103.9 t |
| Axle load | 13 t |
| Water capacity | 12,730 l |
| Fuel capacity | 8.1 t (coal) |
Boiler
| Property | Western Australian Government Railways classes P and Pr “River”Remove |
|---|---|
| Grate area | 3.252 m² |
| Evaporative heating surface | 138.797 m² |
| Superheater surface | 32.888 m² |
| Total heating surface | 171.7 m² |
Power plant
| Property | Western Australian Government Railways classes P and Pr “River”Remove |
|---|---|
| Driver diameter | 1,219 mm |
| Boiler pressure | 11 bar |
| Expansion type | simple expansion |
| Cylinders | two, 483 x 660 mm |
Power
| Property | Western Australian Government Railways classes P and Pr “River”Remove |
|---|---|
| Power source | steam |
| Estimated power | 820 kW (1,115 PS) |
| Starting effort | 118.3 kN |
Calculated values
| Property | Western Australian Government Railways classes P and Pr “River”Remove |
|---|---|
| Optimal speed | 42 km/h |
| Power-to-weight ratio | 7.9 kW/t |
| Tractive force/Heating surface | 1 : 14.39 |
| Grate area/Heating surface | 1 : 52.79 |
| Total/Superheater | 1 : 4.22 |
